Weft stop mechanism for looms



(No Model.) 2 Sheeiiis-Sheet 2. I

D. DUNN.

WE'FT STOP MBOHANISM-FOR LOOMS.

.'N0.364,'163. 1 PatentedMay3L188'7;

ETER filulo-Lhhomphenwashinpm 4 UNITED STATES PATENT OFFICE.

DENIS DUNN, OF PHILADELPHIA, PENNSYLVANIA, AESIGNOR TO GEORGE OROMPTON,OE \VOROESTER, MASSACHUSETTS; MARY O. OROMPTON ADMINISTRATRIX OE SAIDGEORGE OROMPTON, DECEASED.

WEFT-STOP MECHANISM FOR LOOMS.

EPECIFICATION forming part of Letters Patent No. 364,163, dated May 31,1887.

Application filed February 11, 1886. Serial No. 151L545. (No model.)

To all whom, it 11mg concern:

Be it known that I,DENIS DUNN, of the city and county of Philadelphia,and State of Pennsylvania, have invented certain new. and usefulImprovements in \Veft-Stop Mechanisms for Looms; and I do hereby declarethat the following is a full, clear, and exact description of the same,reference being hadto the accompanying drawings, which form a part ofthis specification,

This invention has for its object to improve the construction ofweft-stop motions in looms, whereby the operation of the same is mademore certain and efficient.

In accordance with my invention I provide two feelers, each of which islocated at one side the center of the lay and between theselvage-threads rather than outsidesof the said selvage-threads, suchlocation of the feelers enabling the absence of the weft to be soonerdetected to stop the loom, the feelers arranged between the selvagesbeing much more out of the way of other operative parts of the loom thanif located outside the selvage-warp's, the employment of twofeelers,located as described, enabling more perfect cloth to be woventhan can be done with but one stop-motion located near the middle ofthe-lay.

My invention consists, essentially, of the combination, in a loom, of ashipper-lever, a lay, two sets of feelers located at opposite sides ofthe center of the lay between the selvage warp-threads, the said feelersbeing pivoted at the front of and extended backward over the said lay,two independent daggers, means to connect them with the said feelers, adog adapted to be struck by one or both of the daggers, and meansbetween the said dog and the shipper-lever to release it preparatory tostopping the loom whenever, for any reason,

the filling-thread is passing from under either of the said feelers, aswill be described.

Figure 1 represents a sufficient portion of the front of a loom toenable my invention to be 4 5 understood, the breast-beam being brokenout to show a portion of one of the stop-motions attached thereto. Fig.2 is a partial plan or top view of the lay and breast-beam with the weftstop-motions or the chief parts thereof dotted line as, looking towardthe left.

The lay B, the breast-beam o, the shipperlever on, the auxiliaryshipper-lever t, the rod .9, the angle-lever f, and the lug s are allsubstantially the same in construction and op- 5 5 eration as the partsdesignated by like letters in United States Patent No. 299,966, datedJune 10,1884, to which reference may be had.

In Fig. 3, by dotted lines m, I have shown the warp-threads open to forma shed, and in 5 Fig. 2, by the dotted lines 10 w, I have representedthe selvage warp-threads.

To the front of the lay, at each side of its center, I have attached bysuitable screws two stands, a I). The stand (Z has pivoted in it the 6head a of the feeler a a journal extended through the said head havingattached to it an arm, a, which by a rod, a", is jointed at 3 to an arm,a which is secured to the rock-shaft a, having its bearing in stands 67,'attached to the under side of the lay, the said rock-shaft at itsopposite end having attached-to it the dagger (t the outer extremity ofwhich, as herein shown in Fig. 2, is bent substantially at right anglesto extend over the dagger-lift- 7 mg cam c.

At the opposite side of the loom is a feeler like the'onejust described,and inthe stand b is journaled the head I) of the feeler I), the

journal of the said head extended through the stand I) having anattached arm, If, like the arm a the said arm I) being connectedin likemanner by a rod to an arm, [1 (shown by dotted lines in Fig. 2,) whichis attached to the rock-shaft b", sustained at the under side of the layin suitable bearings, as shown, and, as described, of the rock-shaft I),the said rockshaft 1) having attached to its inner end adagger, I),which is like dagger a and has one end bent or shaped to extend over thedaggero lifting cam. These two feelers and the dagger cooperating witheach one of them are connected together and operate in like manner.

The dagger-lifting cam c is pivoted at 12 upon the bracket 13, attachedby bolts 14 to 5 the breast-beam at its inner side,and,as herein shown,the said cam has forming a part of it a dog, d, and extending, over thedog is an arm,

added; and Fig. 3is a section ofFig. 1 in the 5.0 1

feelers descend that feeler under which there nected with the feelerwhich is so permitted e, which acts upon the inner end of the anglelever f, before referred to, it being pivoted at 15 to the under side ofthe breast-beam.

The arms a and If referred to, both alike, the one marked a being shownin side elevation in Fig. 3, have stops 4 5,which co-operate with one ofthe stands holding one of the rockshafts, thereby limiting the extent ofoscillation of the said shaft, and consequently the movement of thedagger.

The operation of the stopn1otion referred to is as follows, viz: As thelay is moved backward from the position shown in Fig. 3, the daggers aI) ride upon the cam 0, raising the feelers a b for the passage of theshuttle to. lay the filling-threada in the open shed of the warp, asrepresented in Fig. 3. After the filling has been laid,and as the lay ismoved forward toward the breast-beam by the usual cranks andconnecting-rods common to United States PatentNo. 265,659, dated October10, 1882, the feelers descend, and if the fillingn is under both of thefeelers'a b they will rest upon the said filling,and the daggers (t bwill be held above and pass over. the dog d; but if the filling shouldbreak or be absent from under either of the saidfcelers, then as the isno filling will descend below the line of the warp and the top of therace of the lay in a recess therein, and the dagger operatively contodescend will, as the lay is moved forward, engage the dog d, move it,and cause the arm a; connected with it, to act against the end of theangleleverf, moving it upon its fulcrum 15, causing the opposite end ofthe said an glelever to act upon the projection 8 move the rod 8longitudinally under the breast-beam, effecting the disengagement fromits usual holding plate or device of the shipper-lever, thedisengagement of the shipperlever effecting the stoppage of the loom, asprovided for in the patents before referred to.

In the stop-motion represented in the Bigelow patent, No. 86,805, and inall other stop-. motions heretofore used, where two separate feelers areused, one outside each selvage of the warp, the filling can belaid onlyunder one of the said feelers, never under both of them at the sametime, and means had to be provided to prevent the feelers under whichthere was no filling from acting to stop the loom, for the devices shownin the said patent for connecting the two feelers together are socontrived that when the thread is laidundcr one feeler the other feeleris prevented from acting to stop the loom. Feelers connected together asdescribed in said patent can only be used with coarse filling-threadssuch as carpet-yarns which are strong enough to hold or resist theaction of the feelers, for there is so much weight in the parts to bemoved that when the feelers act to feel for the thread they come downwith so much force as to break the ordinary fillingthreads used incotton and woolen goods. It also sometimes happens that thefilling-thread, after being laid in the warp and also under the feeler,becomes broken between the feeler and the box outside of it, the saidthread being broken sometimes by being caught between the shuttle andthe said box and sometimes by imperfection in the filling-thread. Whensuch breakage occurs that part of the filling-thread remaining under thefeeler will serve to pre-- vent the operation of the stop-motion to stopthe loom, and consequently the shuttle containing the broken thread isthrown throughthe shed, the broken end of the shuttle-thread trailingbehind the shuttle. It sometimes happens that this loose end will catchin the threads of the warp in the shed at apointbetween the selvages,and thus become interwoven with but a part of the warp; but as thefillingthread, after its end has been caught in the warp, holds up thefeeler between the selvage and the box, the loom will continue to runnotwithstanding this imperfection in the cloth.

In the apparatus herein described both feelers act upon each crossing offilling laid in the warp, and if the filling be absent under either onethe loom will be stopped.

I claim- The combination, substantiallyasdescribed, of the shipperlever,the lay, two sets of feelers located at opposite sides of the centerofthelay between the selvage warp-threads, the

said feelers being pivoted at the front of and extended backward overthe said lay, two independent daggers, means to connect them with thesaid feelers, the dog adapted to be struck by one or both of thedaggersaud means between the said dog and the shipper-lever to releasethe shipper-lever preparatory to stopping the loom whenever, for anyreason, the filling-thread is absent from under either of the saidfeelers.

In testimony whereof I have signed my name .to this specification in thepresence of two subscribing witnesses.

DENIS DUNN.

Witnesses: SAMUEL A. WYNN, JOHN F. TURNER.

